I have the tristate body as well, it does not have the "perky" FFR buns and is 3" wider through the hips. There's nothing wrong with "perky" butts, I just like a little more junk in the trunk / meat with my potatoes.
I have 17x11 with 315 Drag radials on it right now, as thats the widest Nitto I could get my hands on. The tires get hugely more expensive moving up to 335 or 355.
I figure my first set of tires will be bald in no time, so why dump a bunch of $$ on them.